V680-CA5D01-V2 is a serial RFID controller.
Communication would be either RS232 or RS422/485.
I would start by looking at the CJ1W-SCU41 serial communication module. This has both a 232 and 422/485 port and the Protocol Macro commands. If I am remembering correctly, I think there are Protocol Macros available for the V680 hardware.
Hope this will help.